646888819702 has 4 divisors (see below), whose sum is σ = 970333229556. Its totient is φ = 323444409850.

The previous prime is 646888819679. The next prime is 646888819751. The reversal of 646888819702 is 207918888646.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161722204924 + ... + 161722204927.

It is an arithmetic number, because the mean of its divisors is an integer number (242583307389).

Almost surely, 2^646888819702 is an apocalyptic number.

646888819702 is a deficient number, since it is larger than the sum of its proper divisors (323444409854).

646888819702 is a wasteful number, since it uses less digits than its factorization.

646888819702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323444409853.

The product of its (nonzero) digits is 74317824, while the sum is 67.

The spelling of 646888819702 in words is "six hundred forty-six billion, eight hundred eighty-eight million, eight hundred nineteen thousand, seven hundred two".